I have a point in my code where I’ve got a PropertyInfo (referencing a nullable enum) and an instance of the type, and I want to set the enum value using an integer.

Here’s a full example of what I’m trying to do:

using System;
using System.Reflection;

public enum MyEnum
{
    Value1,
    Value2,
}

public class MyClass
{
    public MyEnum? MyEnumValue { get; set; }
}

public class Program
{
    public static void Main()
    {
        PropertyInfo enumProperty = typeof(MyClass).GetProperty("MyEnumValue");
        MyClass myInstance = new();

        enumProperty.SetValue(myInstance, 1);
    }
}

When I run this, I get the error:

System.ArgumentException: Object of type 'System.Int32' cannot be converted to type 'System.Nullable`1[MyEnum]'.

(Compiler Explorer link for the above: https://godbolt.org/z/YdGf3sK87)

If I make MyEnumValue not nullable, the above code works fine (https://godbolt.org/z/EedzvGe4a)

How could I ensure that I can set this value using an integer? At compile time, I don’t know the type of the enum (even through generics), although I can access the Type for it.